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Mazyrski [523]
3 years ago
11

A student measures the absorbance of a solution containing FeSCN2 ion using a spectrophotometer. The cuvette used by the student

has two frosted walls and two transparent walls. The student properly orients the cuvette so that the path of the light goes through the transparent sides of the cuvette when calibrating the spectrophotometer. How will the measured absorbance of the FeSCN2 be affected if the student incorrectly orients the cuvette so that the path of the light is through the frosted sides of the cuvette
Chemistry
1 answer:
suter [353]3 years ago
6 0

Answer:

The measured absorbance will be too large.  

Explanation:

Fe³⁺(aq) + SCN⁻(aq) ⟶Fe(SCN)²⁺(aq)

A = log₁₀(I₀/I)

If the student orients the cuvette so that the path of the light is through the frosted sides of the cuvette, little light will be able to reach the detector.

The measured intensity (I) will be quite small, so the absorbance (A) will be unusually large.

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